EUROCONTROL
EUROCONTROL is an intergovernmental organisation with 42 Member and 2 Comprehensive Agreement States.
IWXXM METAR-SPECI Subscription and Request Service 1.0
Abstract
The IWXXM METAR-SPECI Subscription and Request Service provides the service consumer with METAR/SPECI report(s) for one or more aerodromes of a State as it becomes available. The service consumer can subscribe to the service, specifying the aerodrome of interest, and receive information as it becomes available. It is also possible to send a direct request, using a request-reply mechanism, to the service to get the relevant meteorological information. The meteorological information is issued by the designated Aeronautical Meteorological Station. The meteorological information is only intended to be used by service consumers within the aviation domain.
Service Type
SWIM_DEFINITION
Business Activity Type
INFORMATION_MANAGEMENT
Intended Consumer
AIR_TRAFFIC_SERVICE_PROVIDER
AIRPORT_OPERATOR
AIRSIDE_GROUND_HANDLER
CIVIL_AIR_NAVIGATION_SERVICE_PROVIDER
CIVIL_AIRSPACE_USER
COMMUNICATION_NAVIGATION_AND_SURVEILLANCE_SERVICE_PROVIDER
MILITARY_AIR_NAVIGATION_SERVICE_PROVIDER
MILITARY_AIRSPACE_USER
PROVIDER_OF_DATA_SERVICES
REGULATED_METEOROLOGICAL_SERVICE_PROVIDER
Information Exchange Category
METEOROLOGICAL_INFORMATION_EXCHANGE
Application Message Exchange Pattern Entity
Geospatial Categorisation Description
The service shall make METAR/SPECI report(s) available for one or more aerodrome(s) within a State. Note: it is expected that a single service will be implemented per State, covering all of the aerodromes within the State.
Provider
Point of Contact
General
Operational Needs
A list of operational needs that this service contributes to satisfying is available in Appendix B. This service satisfies these by offering meteorological information as regulated by Commission Implementing Regulation (EU) 2017/373 of 1 March 2017 and ICAO Annex 3. The scope of the meteorological information satisfies the EU Implementing Regulation 2021/116 - Common Project One.
IER 1 - The information currently included in the METAR/SPECI reports as defined in Commission Implementing Regulation (EU) 2017/373, ICAO Annex 3 Amdt 82 and PANS-MET.
Capabilities
The service provides high quality, up-to-date, trusted, regulated meteorological information in digital form for use by service consumers within the aviation domain.
Functionality
The service consumer shall be able to request the latest METAR/SPECIs for an aerodrome or group of aerodromes.
The service consumer shall be able to subscribe/unsubscribe in order to receive METAR/SPECIs based on ICAO location indicator codes for aerodromes.
The service shall distribute the METAR/SPECIs when they are available.
Access and Use
There shall be a service policy to ensure that only service consumers within the aviation domain can use the service. The service policy shall include a requirement that service consumers cannot pass the information obtained from the service to non-aviation users without prior authorisation from the service provider.
There shall be a service consumption constraint to ensure that a service consumer does not impose undue loads on computer and network resources, for example, by polling it at a higher frequency than the status is normally provided.
The service shall ensure consumer authentication in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0042. The service shall ensure provider authentication in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0042.
The service shall ensure that satisfactory authorisation is put in place according to EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0070.
The service shall ensure point-to-point confidentiality in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile through the use of Transport Layer Security (TLS) 1.2 or above.
The service shall ensure point-to-point integrity in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile through the use of Transport Layer Security (TLS) 1.2 or above.
Quality of Service
The service shall achieve a quality that is sufficient to ensure the service is fit for purpose.
The service shall achieve a quality that is sufficient to ensure the service is fit for purpose.
The service shall achieve a quality that is sufficient to ensure the service is fit for purpose.
The service shall achieve a quality that is sufficient to ensure the service is fit for purpose.
The service shall ensure confidentiality by using SWIM Technical Infrastructure (TI) Yellow Profile bindings.
The service shall ensure integrity by using SWIM Technical Infrastructure (TI) Yellow Profile bindings.
Quality Of Data
The meteorological information offered by the service shall be verified by the service provider. The meteorological information offered by the service shall be encoded according to the rules of the IWXXM standard. The meteorological information offered by the service shall satisfy the WMO No. 8 (2018) Guide to Meteorological Instruments and Methods of Observation.
Abbreviations
Aerodrome Meteorological Office
Advanced Message Queuing Protocol
Aeronautical Meteorological Station
Application Programming Interface
Environmental Data Retrieval
European Union
Hypertext Transfer Protocol
International Civil Aviation Organization
ICAO Meteorological Information Exchange Model
JavaScript Object Notation
Message Exchange Pattern
Aviation routine weather report (in aeronautical meteorological code)
Open Geospatial Consortium
ICAO Procedures for Air Navigation Services - Meteorology
Aerodrome SPECIAL meteorological report (in meteorological code)
System wide information management
Technical Infrastructure
Technical Infrastructure Yellow Profile
Transport Layer Security
A concise statement of the Expected Significant changes in the meteorological conditions at that Aerodrome to be appended to a local routine or local SPECIAL report, or a METAR or SPECI.
Web Feature Service
World Meteorological Organization
Extensible Markup Language
Information
Information Definition
The service shall offer meteorological information in accordance with ICAO Annex 3. The service shall offer meteorological information in accordance with the rules of latest applicable version of IWXXM. Note: the latest applicable version of IWXXM (IWXXM 2023-1) contains the METAR/SPECI schema version 3.1.0.
Filtering
The IWXXM METAR/SPECI Subscription and Request Service Request Interface shall support filtering based on the ICAO location indicator of the aerodrome of interest. The IWXXM METAR/SPECI Subscription and Request Service Subscription Interface shall allow for the selection of subscription based on clearly defined criteria. The service may support other filters based on the operators defined in the OGC Filter Encoding 2.0 Encoding Standard on a case by case basis.
Source of Information
The service provider shall ensure that the meteorological data offered by the services is received from the appropriate authorised originating sources. This includes: REGULATED_METEOROLOGICAL_SERVICE_PROVIDER acting as the designated Aeronautical Meteorological Station (AMS); and REGULATED_METEOROLOGICAL_SERVICE_PROVIDER acting as the designated Aerodrome Meteorological Office (AMO) for the TREND.
Technical
Service Monitoring
A service monitoring mechanism shall be made available to service consumers.
Behaviour
The service behaviour shall be in accordance with the patterns detailed in the Message Exchange Patterns: Identification Guidelines. The typical service behaviour, is:
- The service consumer subscribes to the service
- The service sends the latest METAR/SPECIs to subscribers when they are available and match their subscription. The interfaces have different behaviour. A combination of an AMQP 1.0 implementation and an OGC implementation shall be used for the basic behaviour.The typical behaviour for PUBLISH_SUBSCRIBE means that:
- The subscription is handled by either:
- a request-reply implementation (see IWXXM METAR-SPECI Subscription and Request Service Subscription Interface) or
- an email request to the service provider.
- The distribution of the messages is handled by an AMQP 1.0 implementation (see IWXXM METAR-SPECI Subscription and Request Service Distribution Interface).
- The typical behaviour for REQUEST_REPLY (as used in IWXXM METAR-SPECI Subscription and Request Service Request Interface) is as follows:
- Synchronous Request/Reply: The request message is sent from the service consumer to the service
- The service consumer remains blocked while awaiting the reply
- The service remains blocked while processing the reply
- The METAR-SPECI, the reply message, is sent from the service to the service consumer.
Interfaces
Allows the service consumer to request the latest available METAR/SPECIs. Note: This interface is used to group the operations offered by the chosen OGC standard.
Operations
Explanatory note: The OGC Web Feature Service Interface Standard and OGC API - Environmental Data Retrieval Standard are used to implement the service operations. It is not the intention to repeat the standardised operations here. However, the table below illustrates how the WFS GetFeature operation would look in the context of this service.The GetFeature operation returns a selection of features from a data store. It responds to a GetFeature Request message with a Meteorological Aerodrome Observation Message that satisfies the query expressions specified in the request.
Idempotent
IDEMPOTENT
Operation Message
Service Interface Binding
The WS Light Interface Binding as detailed in the EUROCONTROL Specification for SWIM Technical Infrastructure Yellow Profile, edition 1.1.
Network Interface Binding
The service shall use the network bindings of the SWIM TIYP. The interface shall use at least one of the following OGC standards:
- for services that exchange the meteorological information as resources:
- OGC API - Environmental Data Retrieval Standard;
- for services that exchange the meteorological information as features:
- OGC Web Feature Service 2.0 Interface Standard;
- OGC API - Features.
Note: it is a best practice for new services that exchange meteorological information to implement the OGC API - Environmental Data Retrieval Standard.
Existing services based on the OGC Web Feature Service 2.0 Interface Standard should indicate an end-of-life date.
Messages
Allows the service consumer to select and subscribe to METAR/SPECIs for aerodromes of interest. It allows the service consumer to manage the subscriptions e.g. to unsubscribe. Note: This is an optional interface. Many service providers will prefer to receive subscription requests by email.
Operations
The standard operations for subscription and subscription management. The following operations shall be implement at a minimum:
- subscribe
-unsubscribe
Idempotent
IDEMPOTENT
Service Interface Binding
The WS Light Interface Binding as detailed in the EUROCONTROL Specification for SWIM Technical Infrastructure Yellow Profile, edition 1.1.
Network Interface Binding
The service shall use the network bindings of the SWIM Technical Infrastructure (TI) Yellow Profile.
Allows the service provider to distribute the latest available METAR/SPECIs meeting the need of the service consumer that has subscribed for updates.
Operations
This operation allows the service provider to publish METAR-SPECI report(s) to service consumers based on their subscriptions.
Idempotent
IDEMPOTENT
Operation Message
Service Interface Binding
The AMQP_MESSAGING Interface Binding as detailed in the EUROCONTROL Specification for SWIM Technical Infrastructure Yellow Profile, edition 1.1
Network Interface Binding
The service shall use the network bindings of the SWIM TIYP. AMQP 1.0 shall be used to distribute messages as explained in the Publish/Subscribe Push MEP: Implementation Guidance: https://reference.swim.aero/technical-infrastructure/guidance-for-pub-s…
Messages
References
Service Documents
Revision Save Date
Mon, 09/23/2024 - 16:49
Schema version
v2